Influence of Different Pulse-Width Modulation Methods on Magnet Losses in Permanent Magnet Synchronous Machines

This paper compares the effects of different PWM methods and different switching frequencies on the eddy current loss in the magnets of a dual three-phase PMSM. Results of the 3D-FEM simulation display a significant difference in eddy current loss caused by different PWM methods for high-torque and highspeed operating points under the continuous torque boundary.